Pressure-bar for bookbinding-machines.



CHARLES F. MCBEE, OF ATHENS, OHIO.

PRESSURE-BAR FOR BOOKBINDIlil'G-MACHINES.

Specification of Letters Patent. 7

Patented Sept. 26, 1916.

Application filed April 27, 1914. Serial No. 834,588.

T0 all whom it may concern Be it known that I, CHARLES F. MOBEE, acitizen of the United States, residing in Athens, county of Athens, andState of Ohio, have invented a new and useful Improvement inPressure-Bars for Bookbinding-Machines, of which the following is aspecification.

This invention relates to binding machines of the class adapted toreceive loose sheets and covers, to even the same into book form anddrill the perforations necessary for bind ing, and it has for its objectto provide a pressure bar for the covers and sheets, which will alsooperate as a guide for the drill, a part of the said pressure bar beingadapted to fold back so as to remove it from the way of the operatorwhen he is securing the twine through the perforations.

Further objects reside in the improved means for operating the pressurebar and in the provision of means for securing the bar at any desiredposition.

My invention consists of certain details of construction hereinafter setforth, pointed out in my claim and illustrated in the accompanyingdrawings, in which Figure I shows a perspective view of apart of abinding machine fitted out with my improved pressure bar, the extensionbase being shown in a lowered position and the forward part of thepressure bar being doubled back so as to leave the volume in conditionfor the operator to bind; Fig. II shows a similar view the forward thebase and pressure bar being shown in the position necessary fordrilling; and Figs. III and IV show detail views of the means I employfor securing the pressure bar at any desired position.

Referring to the accompanying drawings the reference numerals l0 and 11are used to indicate the forward standards of a binding machine, thenumeral 12 the base thereof and the numeral 13 the extension baseadapted to be lowered, as shown. The numeral 14 indicates the evenerboard and the numerals 15 and 16 the side eveners.

Binding machines showing the above construction are now in use and aremerely shown and referred to herein to form the basis of my invention.

My invention consists of an improved pressure bar and its peculiarmounting and operation. Each of the standards 10 and 11 is composed ofupright parallei mempers parts of joined at their upper ends by plates30, as shown, and the ends of the pressure bar extend through theopenings thus formed. A rack 17 is secured to the outer surface of eachof the standards and a gear wheel 18 is mounted on each end of thepressure bar and adapted for operation in its respective rack. The twogear wheels are similar in every respect and are mounted rigidly on ashaft 19 passing longitudinally through the pressure bar. Obviously thetwo racks are similar and a hand lever 20 is secured on one end of theshaft 19. It is apparent that the rotation of the lever 20 will causethe pressure bar to be elevated or lowered according to the direction ofrotation of the lever. A metal strap 21 joins the two parallel membersof one of the standards and secured in said strap is a set screw 22designed to engage an upwardly extending guide member 23 of the pressurebar for clamping said guide member against the adjacent plate 30, saidbar operating upward and downward on the said standard. It isobviousthat the setting ofthe said screw will secure the pressure bar inany desired position.

The pressure bar is composed of a main body portion 24 and a forwardlyhinged guide member 25 and in the said hinged portion is a longitudinalslot 26 designed as a guide through which a perforating bit (not shown)operates. This said hinged portion has a downward limit of movementwhich brings it in horizontal alinement with the body portion 24 and itis then held in place, during the drilling operation, by movablesecuring lugs 27, mounted in the manner shown. When it is desired toremove the hinged portion out of the wayfor binding purposes, the lugs27 are moved inwardly against the body portion 24, and the hingedportion elevated and doubled back on the body portion, as shown in Fig.I. When this is done and the extension base 13 is dropped, as shown inFig. I, the operator may then bind the perforated volume.

Iaving thus described my invention what I claim and desire to secure byLetters Patent of the United States is: V

In a book binding machine, a base, spaced standards supporting the sameand. each comprising a pair of spaced vertical members ponstitutingguiding elements connected at their upper ends by a plate, a pressurebar between standards movable. to-

ward and from the base and having its ends guided between the members ofeach standard, a rack secured on the outer face of each standardadjacent the space between the vertical members, a shaft passing throughthe pressure bar, a gear on each end of the shaft meshing with therespective rack, whereby on rotation of the gears the pressure bar willbe moved relative to the base, an upwardly extendinggulde member securedtoeach end of the pressure bar and operating between the spaced membersof the respective stand- Copien 0! this patent may be obtained for fivecents each, by addressing the.

ards, astrap joining the component vertical members of each standardabove the rack, and a screw threaded on each strap to engage and, clampthe adjacent upwardly extending guide members in a predeterminedposition against standard.

CHARLES F. MCBEE.

Witnesses: CHAS. ,E. CAMERON,

VILLA VAN DYKE.

washington n. 0.

Commissioner of Patents,

the plate of the respective

